A person conducting an experiment that ends in catastrophic failure,bodily injury and/or death or close call.

When Dr. science, of the Dr. science show, demonstated the vigorous reaction of potassium metal and water, he dropped a small piece of potassium in a glass of water,it burst into flames, and shot out of the glass, a burning flare, right past his face as he jumped backward, narrowly avoiding getting burned.(no face shield), he became Dr. goddamn dangerous.